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Direction of visual shift and hand congruency enhance spatial realignment during visuomotor adaptation
Christopher L Striemer1,2, Adam Morrill3
1Department of Psychology, MacEwan University, 10700 - 104 Avenue, Edmonton, AB, T5J 4S2, Canada. striemerc@macewan.ca.
Experimental Brain Research
|September 1, 2023
Summary
The hand used and visual shift direction interact during prism adaptation. Congruent hand-eye use leads to larger aftereffects, suggesting hemispheric processing influences visuomotor learning.
Area of Science:
- Neuroscience
- Motor Control
- Cognitive Science
Background:
- Prism adaptation studies visuomotor system's response to sensory perturbations.
- Limited research exists on how hand dominance and visual shift direction interact during adaptation.
Purpose of the Study:
- To investigate the influence of congruent versus incongruent hand use and visual shift direction on prism adaptation.
- To explore potential hemispheric processing differences in visuomotor adaptation.
Main Methods:
- Re-analysis of a dataset where participants adapted to prisms using either their left or right hand.
- Experimentation with healthy adults adapting to optical prism displacement with congruent and incongruent hand-eye conditions.
Main Results:
- A significant 'congruency effect' was observed, with larger adaptation aftereffects when hand use and visual shift direction were congruent.
- This congruency effect was replicated in a new group of participants, confirming its robustness.
Conclusions:
- Visuomotor adaptation is influenced by the interplay between the hand used and the direction of visual shift.
- Understanding the congruency effect can refine models of visuomotor learning and inform therapeutic applications of prism adaptation.
